Pittsburgh Steelers Kevin Greene waiting to make a play in a game verse the Los Angeles Rams on Sunday September 12, 1993 in Anaheim, Calif. (AP Photo/Kevin Reece)

San Francisco 49ers linebacker Kevin Greene circa 1997. (National Football League)

Kevin Greene (91) of the Los Angeles Rams congratulates Mike Wcher (54) after Wilcher's fourth quarter end zone interception guaranteed a 17-3 victory over the New York Jets at Giant Stadium in East Rutherford, N.J., Dec. 1, 1986. (AP Photo/Ray Stubblebine)

Carolina Panthers linebacker Kevin Greene (91) walks off field after play in an NFL football game in 1996. (Al Messerschmidt via AP)

Linebackers coach Kevin Greene of the Green Bay Packers directs play against the Carolina Panthers September 18, 2011 at Bank of America Stadium in Charlotte, North Carolina. (AP Photo/Al Messerschmidt)

San Francisco 49ers linebacker Kevin Greene (91) watches play during an NFL football game in November 1997. (Al Messerschmidt via AP)

Carolina Panthers linebacker Kevin Greene (91) sets for play in an NFL football game in 1996. (Al Messerschmidt via AP)

Former NFL player Kevin Greene, who will be inducted into the Pro Football Hall of Fame class of 2016, speaks in the Hall of Fame press room at the the 5th annual NFL Honors at the Bill Graham Civic Auditorium on Saturday, Feb. 6, 2016, in San Francisco. (Photo by Jack Dempsey/Invision for NFL/AP Images)

Pittsburgh Steelers defensive lineman Kevin Greene (91) rests during an NFL game against the Oakland Raiders on Sunday, Dec. 10, 1995, in Oakland. (AP Photo/Greg Trott)

Pittsburgh Steelers Kevin Greene celebrates the Steelers 41-20 win over the Buffalo Bills Saturday, Jan. 6, 1996, at Three Rivers Stadium in Buffalo. (AP Photo/Gene J. Puskar)

Pittsburgh Steelers linebacker Kevin Greene gives a thumbs up Sunday, Jan. 28, 1996, in Sun Devil Stadium before taking on the Dallas Cowboys in Super Bowl XXX in Tempe, Ariz. (AP Photo/Hans Deryk)

Carolina Panthers linebacker Kevin Greene (91) celebrates in the fourth quarter against the New Orleans Saints at Ericsson Stadium in Charlotte, N.C., Sunday, Oct. 20, 1996. (AP Photo/Chuck Burton)

San Francisco 49ers linebacker Kevin Greene looks on during pre game warmups prior to an NFL football game against the Kansas City Chiefs on Sunday, November 30, 1997 in Kansas City, Missouri. (AP Photo/G. Newman Lowrance)

Carolina Panthers linebacker Kevin Greene (91) watches play during an NFL football game in October 1998. (Al Messerschmidt via AP)

Carolina Panthers linebacker Kevin Greene (91) pass rushes during an NFL football game against the San Francisco 49ers on Sunday, Oct. 17 1999, in San Francisco. (AP Photo/Greg Trott)